[57057.529636] run fstests generic/251 at 2023-10-17 12:54:10
[57058.275854] BTRFS: device fsid ec3e1159-917e-46d6-82d2-6d36aac552b0 devid 1 transid 2956498 /dev/mapper/vg0-lv0 scanned by mount (3926207)
[57058.276553] BTRFS info (device dm-0): using crc32c (crc32c-intel) checksum algorithm
[57058.276559] BTRFS info (device dm-0): using free space tree
[57058.280842] BTRFS info (device dm-0): auto enabling async discard
[57058.532732] BTRFS: device fsid 5d370b90-efd1-49f4-9511-aafc9b218345 devid 1 transid 6 /dev/mapper/vg0-lv9 scanned by mount (3926262)
[57058.534005] BTRFS info (device dm-9): using crc32c (crc32c-intel) checksum algorithm
[57058.534013] BTRFS info (device dm-9): turning on sync discard
[57058.534016] BTRFS info (device dm-9): enabling free space tree
[57058.534018] BTRFS info (device dm-9): using free space tree
[57058.538203] BTRFS info (device dm-9): creating free space tree
[57058.539488] BTRFS info (device dm-9): setting compat-ro feature flag for FREE_SPACE_TREE (0x1)
[57058.539494] BTRFS info (device dm-9): setting compat-ro feature flag for FREE_SPACE_TREE_VALID (0x2)
[57058.608058] BTRFS info (device dm-9): cleaning free space cache v1
[57058.621522] BTRFS info (device dm-9): checking UUID tree
[57467.499208] ======================================================
[57467.499430] WARNING: possible circular locking dependency detected
[57467.499651] 6.6.0-rc5+ #1330 Not tainted
[57467.499793] ------------------------------------------------------
[57467.500018] kswapd0/50 is trying to acquire lock:
[57467.500187] ffff9c0e4434e390 (btrfs_trans_num_writers){++++}-{0:0}, at: join_transaction+0x1d0/0x580
[57467.505029]
but task is already holding lock:
[57467.505234] ffff9c0e42fc6600 (sb_internal#2){++++}-{0:0}, at: btrfs_commit_inode_delayed_inode+0x5f/0x120
[57467.505785]
which lock already depends on the new lock.
[57467.506072]
the existing dependency chain (in reverse order) is:
[57467.506332]
-> #3 (sb_internal#2){++++}-{0:0}:
[57467.506543] start_transaction+0x493/0xad0
[57467.506711] btrfs_commit_inode_delayed_inode+0x5f/0x120
[57467.506920] btrfs_evict_inode+0x273/0x3c0
[57467.507094] evict+0xcc/0x1d0
[57467.508525] inode_lru_isolate+0x14d/0x1e0
[57467.508692] __list_lru_walk_one+0xbe/0x1c0
[57467.509525] list_lru_walk_one+0x58/0x80
[57467.509771] prune_icache_sb+0x39/0x60
[57467.509929] super_cache_scan+0x167/0x1f0
[57467.510340] do_shrink_slab+0x163/0x340
[57467.511123] shrink_slab+0x1d7/0x2a0
[57467.511273] shrink_node+0x2eb/0x7b0
[57467.511422] balance_pgdat+0x344/0x780
[57467.511579] kswapd+0x205/0x410
[57467.511714] kthread+0xff/0x130
[57467.513365] ret_from_fork+0x2d/0x50
[57467.514451] ret_from_fork_asm+0x1b/0x30
[57467.515113]
-> #2 (fs_reclaim){+.+.}-{0:0}:
[57467.515319] fs_reclaim_acquire+0xa2/0xe0
[57467.515707] kmem_cache_alloc_lru+0x4e/0x600
[57467.516115] btrfs_alloc_inode+0x2d/0x250
[57467.516308] alloc_inode+0x1a/0xc0
[57467.516450] iget5_locked+0xba/0x110
[57467.516598] btrfs_iget+0x43/0xe0
[57467.516739] create_reloc_inode+0x1a0/0x360
[57467.516913] btrfs_relocate_block_group+0x1d2/0x3d0
[57467.517109] btrfs_relocate_chunk+0x4c/0x1b0
[57467.517539] btrfs_balance+0x8e7/0x11d0
[57467.517697] btrfs_ioctl+0x1c25/0x2860
[57467.517854] __x64_sys_ioctl+0x8b/0xc0
[57467.518230] do_syscall_64+0x38/0x90
[57467.519171] entry_SYSCALL_64_after_hwframe+0x6e/0xd8
[57467.519813]
-> #1 (btrfs_trans_num_extwriters){++++}-{0:0}:
[57467.520064] join_transaction+0xaf/0x580
[57467.520227] start_transaction+0x1a0/0xad0
[57467.520392] btrfs_uuid_scan_kthread+0x2bc/0x3d0
[57467.520579] kthread+0xff/0x130
[57467.520713] ret_from_fork+0x2d/0x50
[57467.520860] ret_from_fork_asm+0x1b/0x30
[57467.521026]
-> #0 (btrfs_trans_num_writers){++++}-{0:0}:
[57467.521266] __lock_acquire+0x1415/0x2190
[57467.522003] lock_acquire+0xc7/0x2b0
[57467.522152] join_transaction+0x1e4/0x580
[57467.522316] start_transaction+0x1a0/0xad0
[57467.522482] btrfs_commit_inode_delayed_inode+0x5f/0x120
[57467.522689] btrfs_evict_inode+0x273/0x3c0
[57467.522856] evict+0xcc/0x1d0
[57467.522988] inode_lru_isolate+0x14d/0x1e0
[57467.523155] __list_lru_walk_one+0xbe/0x1c0
[57467.523324] list_lru_walk_one+0x58/0x80
[57467.523483] prune_icache_sb+0x39/0x60
[57467.523639] super_cache_scan+0x167/0x1f0
[57467.523802] do_shrink_slab+0x163/0x340
[57467.523963] shrink_slab+0x1d7/0x2a0
[57467.524112] shrink_node+0x2eb/0x7b0
[57467.524259] balance_pgdat+0x344/0x780
[57467.524415] kswapd+0x205/0x410
[57467.524599] kthread+0xff/0x130
[57467.524733] ret_from_fork+0x2d/0x50
[57467.524880] ret_from_fork_asm+0x1b/0x30
[57467.525048]
other info that might help us debug this:
[57467.525537] Chain exists of:
btrfs_trans_num_writers --> fs_reclaim --> sb_internal#2
[57467.525938] Possible unsafe locking scenario:
[57467.526151] CPU0 CPU1
[57467.526312] ---- ----
[57467.526475] rlock(sb_internal#2);
[57467.526603] lock(fs_reclaim);
[57467.526804] lock(sb_internal#2);
[57467.527017] rlock(btrfs_trans_num_writers);
[57467.527196]
*** DEADLOCK ***
[57467.527406] 4 locks held by kswapd0/50:
[57467.527544] #0: ffffffffb6e62ea0 (fs_reclaim){+.+.}-{0:0}, at: balance_pgdat+0x3eb/0x780
[57467.527854] #1: ffffffffb6e513b0 (shrinker_rwsem){++++}-{3:3}, at: shrink_slab+0x113/0x2a0
[57467.528338] #2: ffff9c0e42fc60e0 (&type->s_umount_key#45){++++}-{3:3}, at: super_cache_scan+0x38/0x1f0
[57467.528806] #3: ffff9c0e42fc6600 (sb_internal#2){++++}-{0:0}, at: btrfs_commit_inode_delayed_inode+0x5f/0x120
[57467.529279]
stack backtrace:
[57467.529448] CPU: 0 PID: 50 Comm: kswapd0 Not tainted 6.6.0-rc5+ #1330
[57467.529675] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.13.0-2.fc32 04/01/2014
[57467.529975] Call Trace:
[57467.530308]
[57467.530546] dump_stack_lvl+0x58/0x90
[57467.530874] check_noncircular+0x101/0x110
[57467.531044] ? mark_held_locks+0x49/0x80
[57467.531192] __lock_acquire+0x1415/0x2190
[57467.531341] lock_acquire+0xc7/0x2b0
[57467.531472] ? join_transaction+0x1d0/0x580
[57467.531657] ? lock_release+0x134/0x270
[57467.531811] ? join_transaction+0x1d0/0x580
[57467.531967] ? join_transaction+0x3d/0x580
[57467.532166] join_transaction+0x1e4/0x580
[57467.532313] ? join_transaction+0x1d0/0x580
[57467.532481] start_transaction+0x1a0/0xad0
[57467.532653] btrfs_commit_inode_delayed_inode+0x5f/0x120
[57467.532857] btrfs_evict_inode+0x273/0x3c0
[57467.533029] ? lock_release+0x134/0x270
[57467.533180] ? __pfx_wake_bit_function+0x10/0x10
[57467.533582] evict+0xcc/0x1d0
[57467.533714] inode_lru_isolate+0x14d/0x1e0
[57467.533868] __list_lru_walk_one+0xbe/0x1c0
[57467.534040] ? __pfx_inode_lru_isolate+0x10/0x10
[57467.534215] ? __pfx_inode_lru_isolate+0x10/0x10
[57467.534381] list_lru_walk_one+0x58/0x80
[57467.534544] prune_icache_sb+0x39/0x60
[57467.534690] super_cache_scan+0x167/0x1f0
[57467.534852] do_shrink_slab+0x163/0x340
[57467.535014] ? lock_is_held_type+0xe2/0x140
[57467.535447] shrink_slab+0x1d7/0x2a0
[57467.535613] shrink_node+0x2eb/0x7b0
[57467.535758] balance_pgdat+0x344/0x780
[57467.535899] kswapd+0x205/0x410
[57467.536021] ? __pfx_autoremove_wake_function+0x10/0x10
[57467.536209] ? __pfx_kswapd+0x10/0x10
[57467.536365] kthread+0xff/0x130
[57467.536529] ? __pfx_kthread+0x10/0x10
[57467.536671] ret_from_fork+0x2d/0x50
[57467.536816] ? __pfx_kthread+0x10/0x10
[57467.536973] ret_from_fork_asm+0x1b/0x30
[57467.537128]
[57826.720972] BTRFS: device fsid 5d370b90-efd1-49f4-9511-aafc9b218345 devid 1 transid 117 /dev/mapper/vg0-lv9 scanned by mount (3963938)
[57826.722042] BTRFS info (device dm-9): using crc32c (crc32c-intel) checksum algorithm
[57826.722410] BTRFS info (device dm-9): turning on sync discard
[57826.722647] BTRFS info (device dm-9): using free space tree